ISSN:0001-1541    

DOI:10.1002/aic.690020431

出版商:American Institute of Chemical Engineers    

年代:1956

数据来源: WILEY

ISSN:0001-1541    

DOI:10.1002/aic.690020434

出版商:American Institute of Chemical Engineers    

年代:1956

数据来源: WILEY

ISSN:0001-1541    

DOI:10.1002/aic.690020402

出版商:American Institute of Chemical Engineers    

年代:1956

数据来源: WILEY

摘要:

AbstractChemical equilibrium in this reaction has been determined experimentally by a static or nonflow method at temperatures of 400° and 450°C. and at pressures of 1,000 to 3,500 atm. Equilibrium was approached from both sides and the two reacting gases were always in the stoichiometric ratio. The results are presented both as mole percentage of ammonia in the equilibrium mixture and as the equilibrium constantKp. The constant,Kp, which is a function of pressure, was calculated fromKp°, its value atp= 0, by five different methods and from them the corresponding mole percentages of ammonia were derived for comparison with the experimental results. All such calculations involve assumptions of varying degrees of validity, and no calculated value can be considered accurate. However two of the calculation methods give values which agree reasonably well with the experimental valu

ISSN:0001-1541    

DOI:10.1002/aic.690020403

出版商:American Institute of Chemical Engineers    

年代:1956

数据来源: WILEY

摘要:

AbstractThe film theory of liquid‐side resistance to gas absorption, embodying the assumption of a thin stagnant liquid film adjacent to the interface in which steady state diffusion occurs, has long been open to question, particularly in packed columns. Higbie's penetration theory, believed to be more reasonable, pictures the liquid as flowing over a piece of packing for a very short period of time before being mixed as it flows to the next piece of packing. In the penetration model absorption occurs during a series of brief contacts, and unsteady state mass transfer conditions prevail in the liquid.Several short glass‐wetted‐wall columns 1.9 to 4.3 cm. long were constructed to simulate the assumptions of the penetration theory. Because of the short length ripples were absent except when the gas rate was higher thanReG= 2,200. The desorption of carbon dioxide from water and of chlorine from dilute hydrochloric acid (0.16 to 0.18N) was studied. The desorption rate of carbon dioxide was unaffected by gas velocity up toReGof 2,200 and increased 1.1%/°C. over the temperature range of 22°

ISSN:0001-1541    

DOI:10.1002/aic.690020404

出版商:American Institute of Chemical Engineers    

年代:1956

数据来源: WILEY

摘要:

AbstractMeasurements of the terminal velocity of liquid drops immersed in an insoluble liquid were made for eleven liquid systems, covering a wide range of physical properties: continuous‐phase density 0.960 to 1.145 g./cc., viscosity 0.93 to 1.56 centiposes; dispersed‐phase density 0.807 to 1.674 g./cc., viscosity 0.59 to 72.1 centipoises; interfacial tension 0.3 to 42.4 dynes/cm. A correlation of the data was developed for each of the two velocity‐drop‐diameter regions which permits easy computation of the drop velocities. The correlations are shown to reproduce the present data and much of the published data very satisfactorily. Photographs permitted measurement of the drop eccentricities, which are shown to be a function of the drop diameter, density difference, and interfacial

ISSN:0001-1541    

DOI:10.1002/aic.690020405

出版商:American Institute of Chemical Engineers    

年代:1956

数据来源: WILEY

ISSN:0001-1541    

DOI:10.1002/aic.690020406

出版商:American Institute of Chemical Engineers    

年代:1956

数据来源: WILEY

摘要:

AbstractA study was made of the effect of physical properties and of geometrical and dynamical characteristics of several liquid‐liquid extraction systems on the mass transfer coefficients. The two‐component systems studied consisted of the following solvents with water: cyclohexanol, methyl ethyl ketone, furfural, normal butanol, and nitromethane. The transfer studies were made in a horizontal glass pipe with the phases flowing counter‐currently at velocities from 1,000 to 15,000 lb./(hr.)(sq. ft.). The transfer of solvents into the water phase and of the water into the solvent phase was measured. The film coefficients of mass transfer for a solvent through the water film and for water through the solvent film were correlated by new dimensionless equations which include interfacial tension and diffus

ISSN:0001-1541    

DOI:10.1002/aic.690020407

出版商:American Institute of Chemical Engineers    

年代:1956

数据来源: WILEY

摘要:

AbstractThe design and operation of a pilot‐scale‐moving bed adsorber to separate the various components of a gas mixture using activated carbon as the preferential adsorbent are described. A binary system, methane–acetylene, and a ternary system, methane–carbon dioxide–acetylene, were studied. The performance of the unit was analyzed by means of the transfer‐unit‐height (H.T.U.) concept based on the observed changes in gas composition during tower operation. For both the binary and ternary systems the transfer‐unit height was independent of feed‐gas composition but was found to vary linearly with the ratio of feed gas to carbon flow. The over‐all transfer‐unit‐height values based on either the gas or the adsorbed phase were observed to vary from 6.5 in. at 1.39 std. cu. ft./lb. carbon to 36.9 in. at 4.81

ISSN:0001-1541    

DOI:10.1002/aic.690020408

出版商:American Institute of Chemical Engineers    

年代:1956

数据来源: WILEY

摘要:

AbstractA method for estimating adsorption equilibria based on a modification of the Polanyi adsorption‐potential theory was developed for use in the investigation described in Part I of this article. In addition, the recently published correlation method of Lewis, Gilliland, Chertow, and Cadogan, suitably modified for the present application, was successfully employed in the correlation and extrapolation of the ternary equilibrium dat

ISSN:0001-1541    

DOI:10.1002/aic.690020409

出版商:American Institute of Chemical Engineers    

年代:1956

数据来源: WILEY